Points for attention in the finishing of wool-cotton blended yarn
Release date：2020.09.17 Pageviews：5017
Whether it is direct dye or acid dye, its color fastness is not good, so it is best to use positive charge color fixing agent for treatment after dyeing.In the process from yarn to garment, SN(positive charge), an antistatic agent, is generally added in order to overcome the static electricity generated during processing and reduce the breakage rate.For knitted garments, customers often have higher requirements. Sometimes, after the ready-made clothes, they need soft treatment to adjust the feel. Most softeners are positive charge or weak cation and non - ionic type.In principle, the above three can be treated with bath, but in the specific operation must pay attention to the following points:
1. The dosage of fixing agent is generally 3%~4%(OWf), the treatment condition is 40℃×20min, no longer washing, can be directly dehydrated (not too dry), but in the fixing color bath need to add 98% acetic acid to adjust the pH value to 4~4.5, to prevent the positive charge additive to produce aggregation, improve the fixing color effect.
2.The amount of SN of antistatic agent is 0.5~1g/L, which can be used in the same bath with the color fixing agent and has synergistic effect.
3.Yarns, after bleaching and dyeing, are mostly used in knitted fabrics, the surface of which emphasizes flatness and softness. According to relevant data [1], RL silicone smooth softener series produced by Tongxiang Rongli Chemical Plant has wide adaptability and is consistent with the conditions of solid color bath.For example, RL618B cotton smoothing agent, RL5281 soft smoothing agent and RL3B feel additive can adjust various feel and style.To be smooth and soft, just add RL5281 soft smoothing agent.The soft and fluffy can be added with RL5281 soft smoothing agent (5%~8%(OWf), and then add RL3B feel additive (1~2g/L(OWf).In addition, avoid by all means after making the finished product, then use handle adjustment softener, in order to prevent solid color, antistatic and soft effect offset each other, reduce the qualified rate of the finished product.
